Data/hora: 19/06/2024 02:51:54

Biblioteca(s): 	Embrapa Agricultura Digital.	
Data corrente: 	02/09/1997	
Data da última atualização: 	16/01/2012	
Autoria: 	McCAULEY, J. D.; WHITTAKER, A. D.	
Título: 	Simulating spatial fertilizer applications in cotton production.	
Ano de publicação: 	1992	
Fonte/Imprenta: 	In: INTERNATIONAL CONFERENCE, 4., 1992, Orlando. Computers in agricultural extension programs: proceedings. St. Joseph, MI: ASAE, 1992.	
Páginas: 	p. 159-164.	
Idioma: 	Inglês	
Conteúdo: 	The concept of "prescription farming" or precision application if agronomic inputs may dramatically increase the attention a farmer gives to the spatial distribution of nutrients in the soil and methods of fertilizer application. By using a geographic information system (GIS) and a cotton model, GOSSYM, together as a spatial crop simulation, a methodology for investigating the implications of incorporating prescription farming programs for cotton production is investigated. The data contained in the GIS, the result of intensively sampling a cotton field for nitrate information, is used as the primary input to the model. Hydrologic profile information is also mapped using the GIS and used as input to the model. The model is run for each unique combination of inputs. Crop response is mapped back the GIS for spatial analysis. Information pertinent to prescription forming programs which can be extracted from the spatial simulation are discussed. Precision application of agronomic inputs may necessitate increased soil sampling and increased complexity of the technology on tractors and fertilizer applicators. However, this may also prove to increase crop yields, as well as to provide a degree of environmental protection from excessive use of chemicals.	
Palavras-Chave: 	Aplicação de fertilizantes; Produção de algodão; Simulação de culturas; Sistemas de informação geográfica.	
Thesagro: 	Agricultura de Precisão.	
Thesaurus Nal: 	Cotton; Fertilizer application; Geographic information systems; Precision agriculture.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Agricultura Digital (CNPTIA)	
Exemplares: 	CNPTIA - (5354-1) - ADD - PL - PP - 630.285 - INT - 1997.00027 - DIS